CN112952940A - High-voltage charging system and charging method of high-voltage charging system - Google Patents
High-voltage charging system and charging method of high-voltage charging system Download PDFInfo
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- CN112952940A CN112952940A CN202110182434.8A CN202110182434A CN112952940A CN 112952940 A CN112952940 A CN 112952940A CN 202110182434 A CN202110182434 A CN 202110182434A CN 112952940 A CN112952940 A CN 112952940A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a high-voltage charging system and a charging method of the high-voltage charging system. The high-voltage charging system comprises a vehicle-mounted charger, a heating module, a voltage stabilizing module, a power distribution control module and a battery to be charged; the vehicle-mounted charger is connected with the heating module, the vehicle-mounted charger is connected with the voltage stabilizing module through the power distribution control module, the power distribution control module is used for gating the vehicle-mounted charger and the voltage stabilizing module in a heating stage, the vehicle-mounted charger is used for providing electric energy for the heating module, the heating module is used for converting the electric energy to heat a battery to be charged, and the voltage stabilizing module is used for providing voltage stabilizing protection for the vehicle-mounted charger; the battery to be charged is connected with the vehicle-mounted charger through the power distribution control module, the power distribution control module is also used for gating the vehicle-mounted charger and the battery to be charged in the charging stage, and the vehicle-mounted charger charges the battery to be charged. According to the scheme, the voltage stabilizing module is used for stabilizing the voltage of the vehicle-mounted charger, so that the vehicle-mounted charger can be effectively prevented from outputting an undervoltage fault, and the heating efficiency of the high-voltage battery is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of charging equipment, in particular to a high-voltage charging system and a charging method of the high-voltage charging system.
Background
With the rapid development of human socioeconomic, automobiles gradually enter thousands of households to become the current main vehicle. Although the popularization of automobiles greatly facilitates the traveling of users, the energy shortage and the environmental pollution are caused at the same time, so that the energy conservation and the environmental protection of the automobiles become one of the subjects of the technical development of the automobiles, the rapid development of the technical fields of pure electric automobiles, hybrid electric automobiles, fuel cell automobiles and related parts thereof is further promoted greatly, and particularly the development of new energy automobiles is in a rapidly growing situation.
Along with the improvement of the endurance mileage of the new energy automobile, the electric quantity of the power battery is continuously improved, so that a user has higher requirements on the charging efficiency of the power battery. However, in a low-temperature environment, since the problem of the service life of the high-voltage battery is taken into consideration, it is further necessary to perform a heating treatment before charging the high-voltage battery. At present, a new energy automobile heats a high-voltage battery in a low-temperature environment by an output power provided by a vehicle-mounted charger, and in the heating process of the high-voltage battery by a water heating heater, a power converter also works synchronously, if the low-voltage load of the whole automobile is increased instantaneously or the output power regulation precision of the water heating heater is low, the requirement of the power converter and the water heating heater on the total power is increased, so that the rated output power of the vehicle-mounted charger is exceeded, the vehicle-mounted charger generates an output under-voltage fault, the heating process of the water heating heater is finally stopped, and the heating of the high-voltage battery is stopped.
Disclosure of Invention
The invention provides a high-voltage charging system and a charging method of the high-voltage charging system, which can effectively reduce the probability of the occurrence of output under-voltage fault of a vehicle-mounted charger and improve the heating efficiency of a high-voltage battery.
In a first aspect, an embodiment of the present invention provides a high-voltage charging system, which includes a vehicle-mounted charger, a heating module, a voltage stabilizing module, a power distribution control module, and a battery to be charged;
the vehicle-mounted charger is connected with the heating module, the vehicle-mounted charger is connected with the voltage stabilizing module through the power distribution control module, the power distribution control module is used for gating the vehicle-mounted charger and the voltage stabilizing module in a heating stage, the vehicle-mounted charger is used for providing electric energy for the heating module, the heating module is used for converting the electric energy to heat a battery to be charged, and the voltage stabilizing module is used for providing voltage stabilizing protection for the vehicle-mounted charger; the battery to be charged is connected with the vehicle-mounted charger through the power distribution control module, the power distribution control module is also used for gating the vehicle-mounted charger and the battery to be charged in the charging stage, and the vehicle-mounted charger charges the battery to be charged.
Furthermore, the high-voltage charging system also comprises a control module, the power distribution control module comprises a first relay, and the first relay comprises a first normally open contact, a first normally closed contact and a second normally closed contact;
the control module is connected with the first relay and used for controlling the first relay to be powered on or powered off; the first end of the first normally open contact is connected with the first end of the voltage stabilizing module, the second end of the first normally open contact is connected with the positive end of the vehicle-mounted charger, the first end of the first normally closed contact is connected with the positive end of the vehicle-mounted charger, the second end of the first normally closed contact is connected with the positive end of the battery to be charged, the first end of the second normally closed contact is connected with the negative end of the vehicle-mounted charger and the second end of the voltage stabilizing module, and the second end of the second normally closed contact is connected with the negative end of the battery to be charged.
Further, the high-voltage charging system also comprises a power supply conversion module;
the first end of the power conversion module is connected with the positive end of the vehicle-mounted charger, the second end of the power conversion module is connected with the negative end of the vehicle-mounted charger, the vehicle-mounted charger is further used for pre-charging the voltage stabilizing module in the low-temperature pre-charging stage, and the power conversion module is used for enabling when the voltage stabilizing module is pre-charged to the first threshold voltage.
Further, the power supply conversion module is connected with the battery to be charged through the power distribution control module, the power distribution control module gates the power supply conversion module to be connected with the battery to be charged at the normal-temperature pre-charging stage, and the battery to be charged enables the power supply conversion module to be pre-charged to the second threshold voltage.
Further, the power distribution control module further comprises a second relay and a resistor;
the control module is connected with the second relay and used for controlling the second relay to be powered on or powered off; the second relay comprises a second normally open contact; the first end of the second normally open contact is connected with the first end of the power conversion module, the second end of the second normally open contact is connected with the first end of the resistor, and the second end of the resistor is connected with the positive end of the battery to be charged.
Further, the voltage stabilizing module comprises a voltage stabilizing capacitor;
the first pole of the voltage-stabilizing capacitor is used as the first end of the voltage-stabilizing module, and the second pole of the voltage-stabilizing capacitor is used as the second end of the voltage-stabilizing module.
Further, the heating module comprises a water heating heater;
the first end of the water heating heater is connected with the positive end of the vehicle-mounted charger, the second end of the water heating heater is connected with the negative end of the vehicle-mounted charger, the vehicle-mounted charger is used for providing electric energy for the water heating heater, and the water heating heater is used for heating the battery to be charged when the power supply conversion module is precharged to the first threshold voltage.
In a second aspect, an embodiment of the present invention further provides a charging method for a high-voltage charging system, including:
in the heating stage, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the voltage stabilizing module provides voltage stabilizing protection for the vehicle-mounted charger; the vehicle-mounted charger provides electric energy for the heating module and the power conversion module simultaneously; the heating module converts electric energy to heat the battery to be charged;
in the charging stage, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, and the vehicle-mounted charger charges the battery to be charged.
Further, a low-temperature pre-charging stage is also included before the heating stage;
in the low-temperature pre-charging stage, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the vehicle-mounted charger provides electric energy for the voltage stabilizing module to pre-charge to a first threshold voltage.
Further, the vehicle-mounted charger providing electric energy for the voltage stabilizing module to pre-charge to the first threshold voltage includes:
the vehicle-mounted charger is used for pre-charging the voltage stabilizing module;
acquiring the pre-charging voltage of a voltage stabilizing module;
judging whether the pre-charging voltage is equal to a first threshold voltage or not; if the pre-charging voltage of the voltage stabilizing module is equal to the first threshold voltage, ending the pre-charging of the voltage stabilizing module by the vehicle-mounted charger; if the pre-charging voltage of the voltage stabilizing module is smaller than the first threshold voltage, the vehicle-mounted charger continues to pre-charge the voltage stabilizing module.
According to the technical scheme of the embodiment of the invention, the vehicle-mounted charger is connected with the heating module in the heating stage to provide electric energy for the heating module, the electric energy is converted into heat energy through the heating module to heat the battery to be charged, and the service life of the battery to be charged can be prevented from being consumed by directly charging the battery to be charged in a low-temperature environment. In addition, the vehicle-mounted charger and the voltage stabilizing module are gated through the power distribution control module, the heating module heats the battery to be charged under the low-temperature environment through the output power provided by the vehicle-mounted charger, and if the output power provided by the vehicle-mounted charger cannot meet the total required power of the whole vehicle at the moment, the voltage stabilizing module releases stored energy to meet the total power requirement of the whole vehicle, so that the output voltage of the vehicle-mounted charger is maintained, and the condition that the vehicle-mounted charger has an output undervoltage fault is avoided. Therefore, the voltage stabilizing module can effectively prevent the vehicle-mounted charger from generating an under-voltage fault for voltage stabilizing protection provided by the vehicle-mounted charger, so that the heating module can be ensured to continuously heat the rechargeable battery, the heating power required by the heating module can be kept stable, and the heating efficiency of the heating module on the rechargeable battery can be improved. After the heating module finishes heating the battery to be charged, the charging stage is started, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, the battery to be charged is connected with the vehicle-mounted charger through the power distribution control module, the vehicle-mounted charger can charge the battery to be charged, and the battery to be charged is at a proper temperature for rapid charging and energy storage.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage charging system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a low-temperature charging method of a high-voltage charging system according to an embodiment of the present invention;
fig. 8 is a schematic flow chart illustrating a low-temperature charging method of another high-voltage charging system according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of a normal-temperature charging method of a high-voltage charging system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a schematic structural diagram of a high-voltage charging system, and fig. 1 is a schematic structural diagram of a high-voltage charging system according to an embodiment of the present invention. As shown in fig. 1, the high-voltage charging system includes a vehicle-mounted charger 110, a heating module 120, a voltage stabilizing module 130, a power distribution control module 140, and a battery 150 to be charged; the vehicle-mounted charger 110 is connected with the heating module 120, the vehicle-mounted charger 110 is connected with the voltage stabilizing module 130 through the power distribution control module 140, the power distribution control module 140 is used for gating the vehicle-mounted charger 110 and the voltage stabilizing module 130 in a heating stage, the vehicle-mounted charger 110 is used for providing electric energy for the heating module 120, the heating module 120 is used for converting the electric energy to heat the battery 150 to be charged, and the voltage stabilizing module 130 is used for providing voltage stabilizing protection for the vehicle-mounted charger 110; the battery 150 to be charged is connected to the vehicle-mounted charger 110 through the power distribution control module 140, the power distribution control module 140 is further configured to gate the vehicle-mounted charger 110 and the battery 150 to be charged in a charging stage, and the vehicle-mounted charger 110 charges the battery 150 to be charged.
The vehicle-mounted charger 110 is a charger fixedly mounted on the electric vehicle, and has an automatic and safe charging capability for a power battery of the electric vehicle. The vehicle-mounted charger 110 can dynamically adjust charging current or voltage parameters according to data provided by a Battery Management System (BMS), and execute corresponding actions to complete the charging process. The heating module 120 refers to a device that heats the battery 150 to be charged of the electric vehicle. The voltage stabilizing module 130 has energy storage and voltage stabilizing functions, and can assist the input voltage of the circuit to be maintained in a stable state. The power distribution control module 140 can control the connection of different modules to regulate and control the high-voltage charging system to complete different functional stages. The battery 150 to be charged refers to a power battery of an electric vehicle, and may store electric energy and discharge electric energy. Specifically, in the heating phase, the vehicle-mounted charger 110 is connected to the heating module 120, and the vehicle-mounted charger 110 may provide electric energy for the heating module 120, convert the electric energy into heat energy through the heating module 120, and heat the battery 150 to be charged, thereby avoiding the service life of the battery 150 to be charged due to the loss of the battery 150 to be charged when the battery 150 to be charged is directly charged in a low-temperature environment. The power distribution control module 140 gates the vehicle-mounted charger 110 and the voltage stabilization module 130, the vehicle-mounted charger 110 is connected with the voltage stabilization module 130, and the voltage stabilization module 130 can provide voltage stabilization protection for the vehicle-mounted charger 110. For example, the heating module 120 heats the battery 150 to be charged in a low temperature environment by the output power provided by the vehicle-mounted charger 110, and if the output power provided by the vehicle-mounted charger 110 cannot meet the total required power of the entire vehicle at this time, the voltage stabilizing module 130 releases the stored energy to meet the total power requirement of the entire vehicle, so as to maintain the output voltage of the vehicle-mounted charger 110 and avoid the output under-voltage fault of the vehicle-mounted charger 110. Therefore, the voltage stabilizing module 130 can effectively avoid the vehicle-mounted charger 110 from generating an under-voltage fault for the voltage stabilizing protection provided by the vehicle-mounted charger 110, so that the heating module 120 can continuously heat the battery 150 to be charged, the heating power required by the heating module 120 can be kept stable, and the heating efficiency of the heating module 120 to be charged with the battery 150 can be improved. When the heating module 120 finishes heating the battery 150 to be charged and then enters a charging stage, the power distribution control module 140 gates the vehicle-mounted charger 110 and the battery 150 to be charged, so that the battery 150 to be charged is connected with the vehicle-mounted charger 110, and at this time, the vehicle-mounted charger 110 charges the battery 150 to be charged, so that the battery 150 to be charged is at an appropriate temperature for rapid charging and energy storage.
Fig. 2 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention. As shown in fig. 2, the high-voltage charging system further includes a control module 160, the power distribution control module 140 includes a first relay M1, the first relay M1 includes a first normally open contact K11, a first normally closed contact K12, and a second normally closed contact K13; the control module 160 is connected with the first relay M1 and is used for controlling the first relay M1 to be powered on or powered off; the first end of the first normally open contact K11 is connected with the first end of the voltage stabilizing module 130, the second end of the first normally open contact K11 is connected with the positive end of the vehicle-mounted charger 110, the first end of the first normally closed contact K12 is connected with the positive end of the vehicle-mounted charger 110, the second end of the first normally closed contact K12 is connected with the positive end of the battery 150 to be charged, the first end of the second normally closed contact K13 is connected with the negative end of the vehicle-mounted charger 110 and the second end of the voltage stabilizing module 130, and the second end of the second normally closed contact K13 is connected with the negative end of the battery 150 to be charged.
The control module 160 may send a control signal to the first relay M1 included in the power distribution control module 140, so that the first relay M1 of the power distribution control module 140 gates different channels according to the control signal transmitted by the control module 160, thereby enabling different functional modules to be connected. The power distribution control module 140 includes a first relay M1, and the control module 160 is connected to the first relay M1 and can send a control signal to the first relay M1 to control the first relay M1 to be in a power-on state or a power-off state. The first relay M1 includes a first normally open contact K11, a first normally closed contact K12, and a second normally closed contact K13. A first normally open contact K11 of the first relay M1, wherein when the first relay M1 is in an electrified state, the first normally open contact K11 is closed; when the first relay M1 is in the power-down state, the first normally open contact K11 is opened. A first normally closed contact K12 and a second normally closed contact K13 of the first relay M1, and when the first relay M1 is in the power-on state, both the first normally closed contact K12 and the second normally closed contact K13 are opened; when the first relay M1 is in the power-down state, both the first normally-closed contact K12 and the second normally-closed contact K13 are closed. Specifically, a first end of the first normally open contact K11 is connected to a first end of the voltage stabilization module 130, a second end of the first normally open contact K11 is connected to a positive end of the vehicle-mounted charger 110, and if the power distribution control module 140 receives a control signal of the control module 160 to control the first normally open contact K11 to be closed, the power distribution control module 140 gates the voltage stabilization module 130 and the vehicle-mounted charger 110, so that the voltage stabilization module 130 can provide voltage stabilization protection for the vehicle-mounted charger 110. The first end of the first normally closed contact K12 is connected with the positive end of the vehicle-mounted charger 110, the second end of the first normally closed contact K12 is connected with the positive end of the battery 150 to be charged, the first end of the second normally closed contact K13 is connected with the negative end of the vehicle-mounted charger 110 and the second end of the voltage stabilizing module 130, and the second end of the second normally closed contact K13 is connected with the negative end of the battery 150 to be charged. If the power distribution control module 140 receives the control signal of the control module 160 to control the first normally closed contact K12 and the second normally closed contact K13 to be closed, the power distribution control module 140 gates the vehicle-mounted charger 110 and the battery 150 to be charged, so that the vehicle-mounted charger 110 can charge the battery 150 to be charged. Therefore, the control module 160 sends a control signal to the first relay M1, so that the power distribution control module 140 can be controlled to gate different connection channels quickly and accurately, and the operating efficiency of the high-voltage charging system is improved.
Fig. 3 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention. As shown in fig. 3, the high-voltage charging system further includes a power conversion module 170; the first end of the power conversion module 170 is connected to the positive end of the vehicle-mounted charger 110, the second end of the power conversion module 170 is connected to the negative end of the vehicle-mounted charger 110, the vehicle-mounted charger 110 is further configured to pre-charge the voltage stabilizing module 130 in the low-temperature pre-charge stage, and the power conversion module 170 is configured to enable the voltage stabilizing module 130 when the voltage stabilizing module 130 is pre-charged to the first threshold voltage.
The power conversion module 170 may convert the high-voltage dc output by the vehicle-mounted charger 110 into low-voltage dc to provide electric energy for the low-voltage load of the entire vehicle, and pre-charging is required before the power conversion module 170 is enabled. Specifically, a first end of the power conversion module 170 is connected to a positive terminal of the vehicle-mounted charger 110, and a second end of the power conversion module 170 is connected to a negative terminal of the vehicle-mounted charger 110. Therefore, the power conversion module 170 is connected to the vehicle-mounted charger 110, and the vehicle-mounted charger 110 can provide electric energy to the power conversion module 170 to pre-charge the power conversion module 170 before the power conversion module 170 is not enabled. Illustratively, in the low-temperature pre-charging stage, the power distribution control module 140 receives the control signal of the control module 160 to control the first normally open contact K11 to be closed, so that the power distribution control module 140 gates the voltage stabilizing module 130 and the vehicle-mounted charger 110. The vehicle-mounted charger 110 can simultaneously pre-charge the voltage stabilizing module 130 and the power conversion module 170. In addition, the power conversion module 170 is enabled when the voltage stabilization module 130 performs the pre-charging to the first threshold voltage. The difference between the first threshold voltage and the voltage of the battery 150 to be charged is less than 10V, that is, when the voltage difference between the two ends of the voltage regulator module 130 during the pre-charging process and the voltage of the battery 150 to be charged is less than 10V, it indicates that the voltage regulator module 130 has been pre-charged to the first threshold voltage, and at this time, the power conversion module 170 enables operation.
Optionally, with continued reference to fig. 3, the power conversion module 170 is connected to the battery 150 to be charged through the power distribution control module 140, the power distribution control module 140 gates the power conversion module 170 to be connected to the battery 150 to be charged in the normal temperature pre-charging stage, and the battery 150 to be charged is enabled when the power conversion module 170 is pre-charged to the second threshold voltage.
Wherein, the power conversion module 170 needs to be precharged before being enabled. Specifically, in the normal-temperature pre-charging stage, the power distribution control module 140 gates the power conversion module 170 and the battery 150 to be charged, so that the power conversion module 170 is connected to the battery 150 to be charged. Thus, the battery 150 to be charged may provide power to the power conversion module 170 to precharge it before the power conversion module 170 is not enabled. In addition, the to-be-charged battery 150 is enabled when the power conversion module 170 is precharged to the second threshold voltage. The difference between the second threshold voltage and the voltage of the battery 150 to be charged is less than 10V, that is, when the voltage difference between the reported voltage of the power conversion module 170 and the battery 150 to be charged is less than 10V, it indicates that the power conversion module 170 has been precharged to the second threshold voltage, and at this time, the power conversion module 170 is enabled to operate.
Fig. 4 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention. As shown in fig. 4, the distribution control module 140 of the high-voltage charging system further includes a second relay M2 and a resistor R1; the control module 160 is connected to the second relay M2 and is configured to control the second relay M2 to power on or power off; the second relay M2 includes a second normally open contact K21; the first end of the second normally open contact K21 is connected with the first end of the power conversion module 170, the second end of the second normally open contact K21 is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with the positive terminal of the battery 150 to be charged.
The control module 160 is connected to the second relay M2 included in the distribution control module 140, and may send a control signal to the second relay M2 included in the distribution control module 140, so that the second relay M2 included in the distribution control module 140 gates different channels according to the control signal transmitted by the control module 160, thereby enabling different functional modules to be connected. The power distribution control module 140 includes a second relay M2, and the control module 160 is connected to the second relay M2 and can send a control signal to the second relay M2 to control the second relay M2 to be in a power-on state or a power-off state. The second relay M2 comprises a second normally open contact K21, and when the second relay M2 is in the power-on state, the second normally open contact K21 is closed; when the second relay M2 is in the power-down state, the second normally open contact K21 is opened. Specifically, a first end of the second normally open contact K21 is connected with a first end of the power conversion module 170, a second end of the second normally open contact K21 is connected with a first end of the resistor R1, a second end of the resistor R1 is connected with a positive terminal of the battery 150 to be charged, that is, a series circuit of the second normally open contact K21 and the resistor R1 is connected in parallel at two ends of the first normally closed contact K12. If the power distribution control module 140 receives the control signal of the control module 160 to control the second normally open contact K21 to be closed, the power distribution control module 140 gates the power conversion module 170 and the battery 150 to be charged. In the normal-temperature pre-charging stage, the battery 150 to be charged before the power conversion module 170 is not enabled can supply power to the power conversion module 170 to pre-charge the battery through the closed path of the resistor R1 and the second normally-open contact K21. In order to prevent the pre-charge current provided by the battery 150 to be charged to the power conversion module 170 from being large, the resistor R1 is set to limit the pre-charge current, thereby reducing the pre-charge current provided by the battery 150 to be charged to the power conversion module 170.
Fig. 5 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention. As shown in fig. 5, the voltage stabilization module 130 includes a voltage stabilization capacitor C1; the first pole of the voltage stabilizing capacitor C1 serves as the first terminal of the voltage stabilizing module 130, and the second pole of the voltage stabilizing capacitor C1 serves as the second terminal of the voltage stabilizing module 130.
The voltage-stabilizing capacitor C1 can store a certain amount of electric energy, and can timely intervene to provide energy when the output power of the vehicle-mounted charger 110 exceeds the self-capacity, thereby performing a voltage-stabilizing function. The first pole of the voltage stabilizing capacitor C1 is connected to the first normally open contact K11 as the first terminal of the voltage stabilizing module 130. The second pole of the voltage-stabilizing capacitor C1 is used as the second end of the voltage-stabilizing module 130, is connected to the negative pole of the vehicle-mounted charger 110, and is equivalent to ground. If the power distribution control module 140 receives the control signal of the control module 160 to control the first normally open contact K11 to be closed, the power distribution control module 140 gates the voltage-stabilizing capacitor C1 and the vehicle-mounted charger 110, so that the voltage-stabilizing capacitor C1 can provide voltage-stabilizing protection for the vehicle-mounted charger 110.
Fig. 6 is a schematic structural diagram of another high-voltage charging system according to an embodiment of the present invention. As shown in fig. 6, the heating module 120 includes a water heating heater 121; the first end of the water heating heater 121 is connected to the positive end of the vehicle-mounted charger 110, the second end of the water heating heater 121 is connected to the negative end of the vehicle-mounted charger 110, the vehicle-mounted charger 110 is configured to provide electric energy for the water heating heater 121, and the water heating heater 121 is configured to heat the battery 150 to be charged when the power conversion module 170 is precharged to the first threshold voltage.
The water heating heater 121 may convert the electric energy into heat energy, provide the heat energy for the battery 150 to be charged, and heat the battery 150 to be charged. For example, the water heating heater 121 may be disposed around the battery 150 to be charged or disposed under the battery 150 to be charged to heat the battery 150 to be charged. Specifically, a first end of the water heating heater 121 is connected to a positive terminal of the vehicle-mounted charger 110, and a second end of the water heating heater 121 is connected to a negative terminal of the vehicle-mounted charger 110. In addition, the warming-in-water heater 121 heats the battery 150 to be charged when the power conversion module 170 is precharged to the first threshold voltage, that is, the warming-in-water heater 121 is enabled to operate when the power conversion module 170 is precharged to the first threshold voltage. At this time, the high-voltage charging system enters a heating stage to start heating the battery 150 to be charged. In the heating stage, the vehicle-mounted charger 110 may provide electric energy for the water heating heater 121, and convert the electric energy into heat energy through the water heating heater 121, so as to heat the battery 150 to be charged, thereby avoiding the occurrence of the condition that the battery 150 to be charged is directly charged in a low-temperature environment and the service life of the battery 150 to be charged is lost.
An embodiment of the present invention further provides a charging method for a high-voltage charging system, and fig. 7 is a schematic flow chart of a low-temperature charging method for a high-voltage charging system, which is provided in an embodiment of the present invention, and is used for charging the high-voltage charging system in any one of the foregoing embodiments, where the method includes the following steps:
s101, in a heating stage, a power distribution control module gates a voltage stabilizing module and a vehicle-mounted charger, and the voltage stabilizing module provides voltage stabilizing protection for the vehicle-mounted charger; the vehicle-mounted charger provides electric energy for the heating module and the power conversion module simultaneously; the heating module converts electric energy to heat the battery to be charged;
s102, in the charging stage, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, and the vehicle-mounted charger charges the battery to be charged.
According to the technical scheme of the embodiment of the invention, in the heating stage, the vehicle-mounted charger provides electric energy for the heating module, the electric energy is converted into heat energy through the heating module, and the battery to be charged is heated, so that the problem that the service life of the battery to be charged is consumed when the battery to be charged is directly charged in a low-temperature environment can be avoided. In addition, the vehicle-mounted charger and the voltage stabilizing module are gated through the power distribution control module, the heating module heats the battery to be charged under the low-temperature environment through the output power provided by the vehicle-mounted charger, and if the output power provided by the vehicle-mounted charger cannot meet the total required power of the whole vehicle at the moment, the voltage stabilizing module releases stored energy to meet the total power requirement of the whole vehicle, so that the output voltage of the vehicle-mounted charger is maintained, and the condition that the vehicle-mounted charger has an output undervoltage fault is avoided. Therefore, the voltage stabilizing module can effectively prevent the vehicle-mounted charger from generating an under-voltage fault for voltage stabilizing protection provided by the vehicle-mounted charger, so that the heating module can be ensured to continuously heat the rechargeable battery, the heating power required by the heating module can be kept stable, and the heating efficiency of the heating module on the rechargeable battery can be improved. After the heating module finishes heating the battery to be charged, the charging stage is started, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, the battery to be charged is connected with the vehicle-mounted charger through the power distribution control module, the vehicle-mounted charger can charge the battery to be charged, and the battery to be charged is at a proper temperature for rapid charging and energy storage.
Optionally, a low-temperature pre-charging stage is further included before the heating stage;
in the low-temperature pre-charging stage, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the vehicle-mounted charger provides electric energy for the voltage stabilizing module to pre-charge to a first threshold voltage.
Optionally, the vehicle-mounted charger providing the voltage stabilizing module with electric energy to pre-charge to the first threshold voltage includes:
the vehicle-mounted charger is used for pre-charging the voltage stabilizing module;
acquiring the pre-charging voltage of a voltage stabilizing module;
judging whether the pre-charging voltage is equal to a first threshold voltage or not; if the pre-charging voltage of the voltage stabilizing module is equal to the first threshold voltage, ending the pre-charging of the voltage stabilizing module by the vehicle-mounted charger; if the pre-charging voltage of the voltage stabilizing module is smaller than the first threshold voltage, the vehicle-mounted charger continues to pre-charge the voltage stabilizing module.
The charging method of the high-voltage charging system provided in the above embodiment may be performed by the high-voltage charging system provided in any embodiment of the present invention, and has corresponding beneficial effects of performing the high-voltage charging system, and details are not repeated herein.
Fig. 8 is a schematic flow chart of another low-temperature charging method for a high-voltage charging system according to an embodiment of the present invention, where the method specifically includes the following steps:
s201, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the charger is enabled to output at a constant voltage.
S202, judging whether the pre-charging voltage of the voltage stabilizing module is equal to a first threshold voltage or not.
If the pre-charging voltage of the voltage stabilizing module is equal to the first threshold voltage, the next step is carried out; if the precharge voltage of the voltage stabilizing module is less than the first threshold voltage, jumping back to S201;
s203, enabling the heating module and the power supply conversion module.
And S204, judging whether the temperature of the battery to be charged is equal to the threshold temperature.
If the temperature of the battery to be charged is equal to the threshold temperature, the next step is carried out; if the temperature of the battery to be charged is less than the threshold temperature, jumping back to S203;
s205, stopping enabling the heating module, the power supply conversion module and the vehicle-mounted charger.
And S206, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, so that the charger can output constant current.
And S207, charging the battery to be charged by the vehicle-mounted charger.
The charging method of the high-voltage charging system provided in the above embodiment may be performed by the high-voltage charging system provided in any embodiment of the present invention, and has corresponding beneficial effects of performing the high-voltage charging system, and details are not repeated herein.
Fig. 9 is a schematic flow chart of a normal-temperature charging method of a high-voltage charging system according to an embodiment of the present invention, where the method specifically includes the following steps:
s301, the power distribution control module switches on the power conversion module and the battery to be charged, and the charger is enabled to output at a constant voltage.
S302, whether the pre-charging voltage of the power conversion module is equal to the second threshold voltage or not is judged.
If the pre-charging voltage of the power conversion module is equal to the second threshold voltage, the next step is carried out; if the pre-charging voltage of the power conversion module is less than the second threshold voltage, jumping back to S301;
and S303, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, enables the power supply conversion module and enables the charger to output constant current.
And S304, charging the battery to be charged by the vehicle-mounted charger.
The charging method of the high-voltage charging system provided in the above embodiment may be performed by the high-voltage charging system provided in any embodiment of the present invention, and has corresponding beneficial effects of performing the high-voltage charging system, and details are not repeated herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A high voltage charging system, comprising: the device comprises a vehicle-mounted charger, a heating module, a voltage stabilizing module, a power distribution control module and a battery to be charged;
the vehicle-mounted charger is connected with the heating module, the vehicle-mounted charger is connected with the voltage stabilizing module through the power distribution control module, the power distribution control module is used for gating the vehicle-mounted charger and the voltage stabilizing module in a heating stage, the vehicle-mounted charger is used for providing electric energy for the heating module, the heating module is used for converting the electric energy to heat the battery to be charged, and the voltage stabilizing module is used for providing voltage stabilizing protection for the vehicle-mounted charger; the power distribution control module is used for gating the vehicle-mounted charger and the battery to be charged in a charging stage, and the vehicle-mounted charger charges the battery to be charged.
2. The high voltage charging system of claim 1, further comprising a control module, the power distribution control module comprising a first relay comprising a first normally open contact, a first normally closed contact, and a second normally closed contact;
the control module is connected with the first relay and used for controlling the first relay to be powered on or powered off; the first end of first normally open contact with voltage stabilizing module's first end is connected, the second end of first normally open contact with the positive terminal of on-vehicle machine that charges is connected, the first end of first normally closed contact with the positive terminal of on-vehicle machine that charges is connected, the second end of first normally closed contact with the positive terminal of treating rechargeable battery is connected, the first end of second normally closed contact with on-vehicle machine that charges the negative pole end with voltage stabilizing module's second end is connected, the second end of second normally closed contact with treat rechargeable battery's negative pole end and connect.
3. The high voltage charging system of claim 2, further comprising a power conversion module;
the first end of the power conversion module is connected with the positive end of the vehicle-mounted charger, the second end of the power conversion module is connected with the negative end of the vehicle-mounted charger, the vehicle-mounted charger is further used for pre-charging the voltage stabilizing module in a low-temperature pre-charging stage, and the power conversion module is used for enabling the voltage stabilizing module when the voltage stabilizing module is pre-charged to a first threshold voltage.
4. The high-voltage charging system according to claim 3, wherein the power conversion module is connected to the battery to be charged through the power distribution control module, the power distribution control module gates the power conversion module to be connected to the battery to be charged in a normal-temperature pre-charging stage, and the battery to be charged is enabled when the power conversion module is pre-charged to a second threshold voltage.
5. The high voltage charging system of claim 4, wherein said power distribution control module further comprises a second relay and a resistor;
the control module is connected with the second relay and used for controlling the second relay to be powered on or powered off; the second relay comprises a second normally open contact; the first end of the second normally open contact is connected with the first end of the power conversion module, the second end of the second normally open contact is connected with the first end of the resistor, and the second end of the resistor is connected with the positive end of the battery to be charged.
6. The high voltage charging system according to claim 5, wherein the voltage stabilization module comprises a voltage stabilization capacitor;
the first pole of the voltage-stabilizing capacitor is used as the first end of the voltage-stabilizing module, and the second pole of the voltage-stabilizing capacitor is used as the second end of the voltage-stabilizing module.
7. The high-voltage charging system according to claim 6, wherein the heating module comprises a water-heating heater;
the first end of the water heating heater is connected with the positive end of the vehicle-mounted charger, the second end of the water heating heater is connected with the negative end of the vehicle-mounted charger, the vehicle-mounted charger is used for providing electric energy for the water heating heater, and the water heating heater is used for heating the battery to be charged when the power conversion module precharges to the first threshold voltage.
8. A charging method of a high-voltage charging system for charging the high-voltage charging system according to any one of claims 1 to 7, comprising:
in the heating stage, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the voltage stabilizing module provides voltage stabilizing protection for the vehicle-mounted charger; the vehicle-mounted charger provides electric energy for the heating module and the power supply conversion module simultaneously; the heating module converts the electric energy to heat the battery to be charged;
in the charging stage, the power distribution control module gates the vehicle-mounted charger and the battery to be charged, and the vehicle-mounted charger charges the battery to be charged.
9. The method of charging a high voltage charging system according to claim 8, further comprising the low temperature pre-charge stage prior to the warm-up stage;
in the low-temperature pre-charging stage, the power distribution control module gates the voltage stabilizing module and the vehicle-mounted charger, and the vehicle-mounted charger provides electric energy for the voltage stabilizing module to pre-charge to the first threshold voltage.
10. The charging method of the high-voltage charging system according to claim 9, wherein the pre-charging to the first threshold voltage by the vehicle-mounted charger supplying the electric energy to the voltage stabilizing module comprises:
the vehicle-mounted charger pre-charges the voltage stabilizing module;
acquiring a pre-charging voltage of the voltage stabilizing module;
determining whether the precharge voltage is equal to the first threshold voltage; if the pre-charging voltage of the voltage stabilizing module is equal to the first threshold voltage, ending the pre-charging of the vehicle-mounted charger for the voltage stabilizing module; if the pre-charging voltage of the voltage stabilizing module is smaller than the first threshold voltage, continuing the pre-charging of the electric voltage stabilizing module by the vehicle-mounted charger.
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| CN202110182434.8A CN112952940A (en) | 2021-02-07 | 2021-02-07 | High-voltage charging system and charging method of high-voltage charging system |
| PCT/CN2021/142965 WO2022166491A1 (en) | 2021-02-07 | 2021-12-30 | High voltage charging system and charging method of high voltage charging system |
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| CN202110182434.8A CN112952940A (en) | 2021-02-07 | 2021-02-07 | High-voltage charging system and charging method of high-voltage charging system |
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| WO2022166491A1 (en) * | 2021-02-07 | 2022-08-11 | 中国第一汽车股份有限公司 | High voltage charging system and charging method of high voltage charging system |
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Application publication date: 20210611 |